1. Go to Analysis > Information Library.  Click Add an ad-hoc query.  Select the source view of Constituents and click OK.
  2. On the left, expand Sales Order, then sales order item, then sales order item ticket.  Then click Program on the left.
  3. In the middle, click Program Record and move this to Include Records Where.  Set the criteria to equal to and search for your program.  Click OK.
  4. On the left, click on Program Events.  In the middle, click on Start date and move this to Results Fields to Display.
  5. Click on Start date in Results Fields to Display, then click on the Sum button and choose the Count function.
  6. At the top left, click Constituents.
  7. In the middle, click Lookup ID and  move to Results Fields to Display.
  8. On the left, click Email Addresses.  In the middle, click Email Address and move to Results Fields to Display.
    1. Note: You may want to only one email address in query output.
  9. Go to the Set Sort and Group Options tab.
  10. Click on the COUNT (Sales Order\Sales Order Item\Sales Order Item Ticket\Program Events\Start date) and move it to the bottom right.  Set the criteria to on or after 2.
  11. Go to the Set Save Options tab.
  12. Name and save your query.

Note: This will exclude anyone who bought tickets to an event anonymously.